 In these periods it was often feasible for Haydn to make brief visits to Vienna, about 40 km away.As Jones notes, there were various points in the 1770s and early 1780s when Haydn and Mozart might have met, Haydn visiting Vienna from his normal work venues of Esterháza and Eisenstadt, Mozart from Salzburg.The earliest at which it is "likely" they would have met is 22 and 23 December 1783, at a performance sponsored by the Vienna Tonkünstler-Societät, a charitable organization for musicians.